Renesas ZSSC3240CC1B

Overview

ZSSC3240CC1B from Renesas is a sensor signal conditioning IC (SSC) for high-accuracy amplification, digitization, and correction of resistive sensor signals-including bridge, half-bridge, Pt100, and external diode sensors-featuring 24-bit ADC resolution, 16-bit DAC output, I²C/SPI/OWI interfaces, and -40°C to +125°C operation. It delivers calibrated analog voltage (0–1V/0–5V), ratiometric, or 4–20mA current-loop outputs in industrial pressure, flow, and medical sensing systems.

For engineers reviewing the ZSSC3240CC1B datasheet, ZSSC3240CC1B pinout, ZSSC3240CC1B application, or ZSSC3240CC1B equivalent, key selection considerations include supported sensor configurations (ratiometric vs. current-mode bias), programmable measurement scheduler trade-offs between update rate (up to 2.91 kHz) and power (as low as 1.5 µA idle), and analog output flexibility with short-circuit protected AOUT/OWI1 pin.

Technical Context

The ZSSC3240CC1B integrates a 24-bit math core executing sensor-specific correction algorithms using calibration coefficients stored in reprogrammable NVM. Its analog front-end includes a programmable-gain amplifier (1.32–540 V/V gain) and dual-stage ADC supporting 12-/16-/24-bit conversion modes with ENOB up to 18.1 bits at 24-bit resolution.

Digital interface support includes SPI (up to 10 MHz), I²C (Standard/Fast/High-Speed modes), and OWI (up to 100 kbit/s), all configurable for calibration or system-level communication. Three operational modes-wake-up-on-request, continuous/fast-response, and automatic cyclic measurement-enable optimization across energy, accuracy, and update rate requirements.

Key Specifications

Pinout & Package

Package: 4 × 4 mm² 24-QFN with wettable flanks (exposed thermal pad connected to VSS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar sensor signal conditioning applications.

Compared with AD7798, ZSSC3240CC1B integrates correction math, NVM, and analog output-enabling standalone smart sensor operation without host MCU intervention. Versus ICM-42688-P, it supports resistive sensors exclusively and delivers calibrated analog outputs critical for legacy industrial 4–20mA systems.

Availability

ZSSC3240CC1B is available at Aetrix Electronics and suitable for industrial pressure transducers, medical blood pressure monitors, HVAC temperature controllers, and white goods weight scales requiring stable component supply across long production lifecycles.

Supply support for ZSSC3240CC1B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The ZSSC3240 product line targets high-accuracy smart sensor modules, integrating signal conditioning, correction math, and flexible analog/digital I/O to replace multi-chip discrete front-ends in industrial and medical sensing.

FAQ

What sensor types does the ZSSC3240CC1B support?

The ZSSC3240CC1B supports resistive bridge and half-bridge sensors, Pt100 RTDs, NTC/PTC thermistors, and external temperature diodes. It accommodates sensor resistances from 0.5 kΩ to 60 kΩ and signal spans from 1 mV/V to 500 mV/V. The ZSSC3240CC1B uses its TEXT pin to bias external diodes and its VDDB/VSSB rails for ratiometric bridge excitation-enabling direct connection without external components.

How does the ZSSC3240CC1B achieve 0.01% FSO accuracy?

The ZSSC3240CC1B achieves 0.01% full-scale output (FSO) accuracy through on-chip 26-bit math core execution of sensor-specific correction algorithms using calibration coefficients stored in reprogrammable NVM. These coefficients compensate for offset, sensitivity, temperature drift, and non-linearity across -40°C to +125°C. The ZSSC3240CC1B's 24-bit ADC (ENOB up to 18.1 bits) and programmable PGA ensure high-fidelity digitization prior to correction.

Can the ZSSC3240CC1B operate with supply voltages above 5.5 V?

Yes-the ZSSC3240CC1B supports extended supply operation from 5 V to 48 V using its LDOctrl pin to drive an external transistor (e.g., JFET). In this configuration, the ZSSC3240CC1B regulates VDD to a programmable target (4.6–5.5 V) while drawing power from the higher-voltage rail. This capability enables use in 24 V industrial loops and 48 V telecom infrastructure without external regulators.

What are the analog output options available on the ZSSC3240CC1B?

The ZSSC3240CC1B offers three analog output configurations: (1) absolute voltage (0–1 V or 0–5 V), (2) VDD-ratiometric voltage (2.5–97.5% of VDD), and (3) 4–20 mA current loop. All are generated by its programmable 13–16-bit DAC and delivered via the AOUT/OWI1 pin, which includes short-circuit protection (10–12 mA limit). Output selection is configured via NVM registers and requires no external components.

Does the ZSSC3240CC1B support wake-up-on-request operation?

Yes-the ZSSC3240CC1B features a wake-up-on-request mode where it remains in ultra-low-power idle state (1.5 µA typical) until triggered by a digital interface command (I²C/SPI/OWI) or external event. Upon wake-up, it performs a single sensor measurement, applies correction, and outputs results digitally or via analog output. This mode is ideal for battery-powered devices requiring intermittent sensing with minimal average current draw.